Hydraulic press.



No. 728,628. "-PATENTED MAY 19, 1903. c. SEYMOUR. HYDRAULIC PRESS.

APPLICATION FILED NOV. 19, 1902.

N0 MODEL. 4- SEEETS-BHEET 1.

WITNESSES. /N VENTOH No'728,628. PATENTED MAY 19, 1903. I

-0.- SEYMOUR.

HYDRAULIC PRESS.

APPLICATION FILED NOV. 19. 1902.

1101101231.. 4 SHEETS-SHEET 2.

WITNESSES: /NVENTOH 67161116502 mow' B) amp/Jaw @M I PATENTBD MAY 19, 1903. 0. SEYMOUR. HYDRAULIU PRESS.

APPLICATION IILED NOV. 19, 1902.

4 SHEETS-SHEET 4- kwm/ UNITED STATES CHARLES SEYMOUR, OF

llatnted May 19, 1903-.

- PATENT OFFICE.

HYDRAULIC PRESS.

SPECIFICATION forming" part Of Letters Patent No. 728,628, dated May 19, 1903.

Application filed November 19, 1902. Serial No. 131,986. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES SEYMOUR, a citizen of the United States, and a resident of Defiance, in the county of Defiance and State of Ohio, have invented a new and Improved Hydraulic Press, of which the following is a full, clear, andexaot description.

The object of the invention is to provide a new and improved hydraulic press which is simple'and durable in construction, very ef-. fective in operatiomcompletely under the con-'- trol of the'operator to permit instant regulation of the pressure to be exerted, and more especially designed for pressing axle-boxes upon the hubs of'wheels, for pressing bands and flanges upon the wheel-l1 ubs, and for variousother' purposes.

The invention consists of novel features and parts and combinations of the same, as will-be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in. the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure lis a perspective view of the im provement as applied for pressing the band onto the hub of awheel. Fig. 2 is an enlarged sectional side elevation of the double-acting pump, the section being on the line 2 2 of Fig. 4. Fig. 3 is a similar view of the same on the line 3 3 of Fig. 4. Fig. 4is a sectional plan view of the same on the line 4 4 of Fig. 3. Fig. 5 is an enlarged sectional plan view of the same on the line 5 5 of Fig. 3. Fig. 6 is an enlarged transverse section of the same on the line 6 6 of Fig. 4; and Fig. 7 is an enlarged sectional side elevation of the safetyvalve, the section being on the line 7 7 of Fig. 4.

The main frame of the hydraulic press shown in Fig. 1 consists of suitable standards A and A,connected with each other by a base beam B and a top beam B, of which the latter carries on its under side an ad justingscrew 0, and the base-beam B supports on its top a hydraulic cylinder D, in which operates a piston D, extending upwardly through the top of the cylinderin axial alinement with the adjusting-screw O. The work E is placed between a piston-head D and the adjusting screw 0 in the usual manner.

The lower end of the cylinder D is connected by a pipe D with a reservoir F, ar-

ranged within a casing G, held on the main frame of the press, and this casing is adapted to contain water, oil, or other suitable liquid.

The reservoir F forms part of a double-acting pump arranged horizontally and submerged in the liquid contained in the casing G, and the said pump is constructed in detail as follows: Horizontal cylinders; H and H in axial alinement with each other are provided at their outer ends with valved suctions I and 1, opening into the liquid containedin the casing G, and the said cylinders are connected by valved outlets'J and J with the reservoir F, so that when the double-acting pump is in motion the liquid is sucked in from the casing G by way of the suctions I and 1 into the cylinders H and H, to be discharged from the latter through the outlets J and J into the reservoir F, from which the liquid passes under pressure through the pipe D into the hydraulic cylinder D to force the piston D therein upward for exerting the desired pressure on the work.

The valves of the suctions I and I and outlets J and J are preferably in the form of ball-Valves normally held to their seats by springs, as plainly shown in Fig. 5. In the cylinders H and H reciprocate plungers H and H secured at their inner ends on a crosshead K, mounted to slide longitudinally on guideways G, formed in the bottom of the casing G, and in the said cross-head K is 'formed a vertical guideway K for a trunnionblo'ck K to slide in, the said block being pivotally connected at its trunnion with one arm L of a double or bell-crank lever L, having its pivot L mounted to turn in suitable bearings formed in the front and rear sides of the casing G. (See Fig. 4.) The other arm L of the bell-crank lever L is pivotally con- 5 fast and loose pulleys P, connected by a belt I03 with other machinery for imparting a rotary motion to the main shaft 0. A shiftinglever P under the control of the operator serves to control the belt for the pulleys P.

Now when the main shaft 0 rotates its crankarm O imparts motion to the pitman N to rock the bell-crank lever L, so that the latter by the block K imparts a reciprocating motion to the cross-head K for actuating the plungers H and H in the cylinders H and H to cause alternate suction and discharge of the liquid from the casing G into the reservoir F, as above described.

The pitman N extends loosely through a large opening G in the top of the casing G, and in order to prevent dust and other impurities from passing into the casingG and to the liquid contained therein a stuffing-box Q is provided arrangedon the top of the easing G, as plainly indicated in Figs. 1, 2, and The stufling-hox Q is made flexible, so as to conform to the swinging motion of the pitman N, and for this purpose the said stuffing-box is provided with a tube Q in the shape of the frustum of a cone and made of leather, rubber, or similar flexible material. Into the ends of the tube Q are fitted metallic rings Q Q of which the ring Q in the apex end of the tube Q fits snugly around the pitman N, while the lower or base ring Q is sufficiently large to allow free movement of the pitman through the said ring. Clampingrings Q and Q engage the ends of the tube Q at the outside thereof to securely fasten the several parts together, the ring Q being preferably flanged and secured by bolts Q to the top of the casing.

Now it is evident that when the machine is in motion and the pitman N rocks the tube Q readily swings with the pitman owing to the flexible nature of the tube Q.

The reservoir F is provided with a discharge R, opening into the casing Gand having a plug-valve R, (see Fig. 6,) engaged by a stem R extending upwardly through a suitable stuffing-box R secured to the top of the casing G, and on the outer end of the said stem R is arranged a handle R under the control of the operator, for opening or closing the plug-valve R to connect or disconnect the reservoir F and the interior of the casing G.

Now by the arrangement described the pressure-supply to the pipe D and hydraulic cylinder D can be instantly stopped by the operator opening the plugvalve R without stopping the, pump, and by opening the plugvalve R more or less more or less pressure can be supplied to the pipe D and the cylinder D. Thereservoir F is also provided with a safety-valve S, (see Figs. 2 and 7,) and for this purpose the reservoir F is provided with a branch pipe F, into which screws the easing S of the safety-valve, the said casing being provided with a ball-valve S controlling the connection between the branch pipe F and the outlets S formed in the casing S and opening into the casing G. On the top of the ball-valve S rests a plug S, mounted to slide in the casing S and engaged on its top by one end of a lever S fulcrumed on the casing S's A spring 55 is connected with the outer end of the lever S and is attached to a screw-rod S extending upwardly through a cap S to be engaged at its outer end by nuts S, which serve to regulate the tension of the spring S to allow of setting the safetyvalve to any desired pressure.

Now it is understood that when the press is in operation and the pressure exerted against the piston D in the cylinder D exceeds the pressure to which the safety-valve S is set then the liquid forces the valve S upward into an open position to allow the liquid to pass from the reservoir F by way of the branch pipe F and openings S back into the casing G. From the top of the reservoir F leads a pressure-gage pipe T to a pressure-gage T for indicating the pressure within the reservoir F, and consequently that exerted against the piston D. The top of. the casing G is provided with a filling-plug U to fill the casing G with the desired amount of liquid.

The operation is as follows: The work E is placed in position between the head D of the piston Dand the adjusting-screw O, and then the operator shifts the shifting-lever P to move the belt from the loose to the fast pulley P to rotate the shaft 0, whereby areciprocating motion is given to the cross-head K by the intermediate mechanism above described. The plungers H and H carried by the cross-head K, now cause alternate suction and discharge of the liquid from the casing Ginto the reservoir F, from which the liquid passes by the pipe D into the cylinder D to force the piston D therein upward to subject the work E to the desired pressure, and when the work is finished the operator turns the handle B", so that the plug-valve R moves into an open position to cause the liquid to discharge from the reservoir F back into the casing G without stopping the action of the main shaft 0. The piston D is thus relieved of'pressure and readily returns to a lowermost position to allow removal of the finished work and placing of new work in position on the head D after which the handle R is turned to its former position to close the plug-valve B, so that the pressure of the pump is again exerted against the piston D, and the above-described operation is repeated. Thus by the arrangement described the double-actingpurnpneed not be stopped while removing the finished Work and placing new work in position, it being only necessary for the operator to manipulate the handle R as above explained.

As the double-actingpump is disposed horizontally within the casing and practically submerged in the liquid contained in the easing, there is no danger of the pump working dry, as the liquid by its own gravity, besides the suction action of the pistons, readily fills the cylinders, so that no air-pockets are liable to form in the cylinders, reservoir F, pipe D or hydraulic cylinder D, and hence a positive and direct action of the piston D is always the result.

The double-acting pump and parts connected therewith are very simple in construction and not liable to get out of order.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1'. A hydraulic press provided with a double-acting pump, comprising a casing for containin g a liquid, alined horizontally-disposed pump cylinders within the casing, having valved suctions and valved discharges, plungers in the said cylinders, a cross-head mounted to slide in the casing and carrying the said plungers, a double crank-arm mounted to rock in the casing and having one arm connected with the cross-head,a pitman connected with the other arm of the crank-arm, a revolnble crank-shaft outside the casing, connected with the said pitman, and a flexible stuffing-box on the said casing, through which passes the said pitman, as set forth.

2. A hydraulic press having a casing for containing a liquid, a pump within the easing, a double crank-arm for actuating the pump, a pitman connected with the double crank-arm and extending through an opening in the casing, a crank-shaft connected with the pitman, and a flexible stufiing-box for the pitman, securedto the casing, as set forth.

3. A stufling-box for an oscillating part,

comprising a flexible tube, rings fitting the inside of the tube, one of the rings fitting the said part slidably, and means for clamping the outside of the tube at the rings, one of the means being fixed, as set forth.

4. A stuffing-box for a pitman, extending loosely through an opening in a casing, comprisinga tube in the shape of the frustum of a cone, rings inserted in the ends of the tube, thev ring in the apex and of the tube slidably fitting the pitman, a clamping-ring outside of the apex end of the cone, and a fastening-ring on the outside of the base end of the tube, secured to the said casing, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES SEYMOUR.

Witnesses:

GEO. W. DEATRICK, J os. BAUER. 

